fix: add type params to typealias

Author: brandonspark

grammar.js

@@ -179,6 +179,7 @@ module.exports = grammar({
       optional($.modifiers),
       "typealias",
       alias($.simple_identifier, $.type_identifier),
+      optional($.type_parameters),
       "=",
       $._type
     ),
@@ -1188,7 +1189,7 @@ module.exports = grammar({
       $._backtick_identifier,
     ),
 
-    _alpha_identifier: $ => /[a-zA-Z_][a-zA-Z_0-9]*/,
+    _alpha_identifier: $ => /[\p{L}_][\p{L}\p{Nd}_]*/,
 
     _backtick_identifier: $ => /`[^\r\n`]+`/,
 

src/grammar.json

@@ -267,6 +267,18 @@
           "named": true,
           "value": "type_identifier"
         },
+        {
+          "type": "CHOICE",
+          "members": [
+            {
+              "type": "SYMBOL",
+              "name": "type_parameters"
+            },
+            {
+              "type": "BLANK"
+            }
+          ]
+        },
         {
           "type": "STRING",
           "value": "="
@@ -6065,7 +6077,7 @@
     },
     "_alpha_identifier": {
       "type": "PATTERN",
-      "value": "[a-zA-Z_][a-zA-Z_0-9]*"
+      "value": "[\\p{L}_][\\p{L}\\p{Nd}_]*"
     },
     "_backtick_identifier": {
       "type": "PATTERN",

src/node-types.json

@@ -8289,6 +8289,10 @@
           "type": "type_modifiers",
           "named": true
         },
+        {
+          "type": "type_parameters",
+          "named": true
+        },
         {
           "type": "user_type",
           "named": true